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The purpose of this paper is to estimate the efficiency of the inverter circuits used for the Photovoltaic (PV) systems. The analysis of a power electronics converter with the SPICE during the steady-state operation takes a long time and the results may not be obtained accurately due to convergence problem in the solver. The MATLAB package program is widely preferred to analyze the power electronics...
In this proposed work a basic unit is developed. A single unit can generate two positive and a zero level at the output. As this basic unit can develop positive levels, for negative levels, H-bridge is in addition connected to it. This is advance cascaded H-bridge multi-level inverter. With this it is possible to generate all output levels i.e. positive, zero and negative level. Also in this paper...
This manuscript introduces an efficient and generalized basic topology adopted for multilevel inverters. It is shown that the proposed structure is in line with significant savings in part counts and control devices. According to the basic topology, a new structure for sub-multilevel inverter is suggested. In continue, cascaded multilevel inverter is realized based on the series connection of n sub-multilevel...
For medium and high voltage applications, Multilevel inverters have been widely used as a important devices. The advantages of multilevel inverters include low electromagnetic interference (EMI) outputs, low power dissipation, low harmonic etc. The most common multilevel inverter topology is cascaded H-bridge topology constituted by IGBT semiconductors. The most common switching technology used is...
This paper presents a Multilevel inverter that consists of a standard 3-leg two level inverter cascaded with two new neutral point clamped H-bridge inverter in series with each inverter leg with a single dc voltage source of 300V. The control signals for this multilevel inverter is obtained by using carrier based PWM technique. The proposed multilevel inverter is used to obtain a pure sinusoidal waveform...
In article variants of hardware realization of system of vector management by the electric drive on a basis asynchronized switched motor with use of modern element base are considered, and also application possibility as current inverter, and inverter of pressure for a food of windings stator is shown. The analysis of modern controlers for systems of the electric drive is given and the variant of...
This paper introduces a method for incorporating matlab-script based power electronics filtering and control algorithm into Simulink environment. By doing so, the filter and control performance is very much close to reality when being implemented in microcontroller. This further shortens the distance between simulation and physical implementation. It provides circuit and its control designer with...
Hybrid Electric Vehicle (HEV) is an emerging technology in the modern world because of the fact that it mitigates environmental pollutions and at the same time increases fuel efficiency of the vehicles. Multilevel inverter controls electric drive of HEV of high power and enhances its performance which is the reflection of the fact that it can generate sinusoidal voltages with only fundamental switching...
In this paper, the development of three-phase renewable energy inverter by using the dSPACE DS1104 digital signal processing controller board is presented. The board enables the MATLAB/Simulink model linking to the hardware. The standalone voltage source inverter's control system which is implemented in the DS1104 board utilizes a digital proportional integral controller to stabilize its 50Hz sinusoidal...
This paper proposes the maximum power tracking from the Photovoltaic system, which is interfaced with utility grid through a three phase inverter, by using a fuzzy logic controller. In this arrangement, three phase step up transformer is used to synchronize the inverter output with the grid ratings. Controller tracks and feeds maximum power to the utility grid. The linguistic variables have been selected...
Power modules including IGBT are widely used in the applications of motor drivers in Electric Vehicle. The thermal behavior of these modules becomes more important to choose the optimum design of cooling system. In this paper, we propose a RC thermal model of the dynamic electro-thermal behavior of IGBT PWM (Pulse Width Modulation) inverter modules. This model is used to estimate the maximum junction...
One kind of variable reactor is proposed. It consists of variable reactance converter and electronic power inverter. The topology and the impedance conversion mechanism of variable reactor are illustrated. And the variable reactor is simulated using Matlab/Simulink. The simulation results prove that the impedance of variable reactor can be adjustable smoothly and its higher harmonic content is small...
An increasing part of low voltage standard induction motors operates with PWM voltage source inverters using IGBTs and they are applied to a wide range of power 0.1 kW up to some MW. The PWM (pulse width modulation) inverter mode of control generates a large frequency spectrum of overvoltages. The resulting undesired overvoltages at the motor terminals stress the motor insulation. Usual standards...
Different pulse width modulation methods, such as sinusoidal PWM and space vector PWM (SVPWM), have been widely utilized to control the output voltage of the three-phase voltage source inverter (VSI). A novel SVPWM algorithm is presented in this paper. The principle of novel SVPWM is explained firstly. Then the deduction, testification and simulation based on the MATLAB are given. Finally the novel...
A novel static compensator (STATCOM) is proposed in this paper. The new STATCOM is constructed by a hybrid topology cascading a neutral-point-clamped (NPC) inverter and several identical H-bridge inverters. With the novel topology consisting of a same DC bus voltage but different structure modules, the realization of a multilevel converter using a hybrid approach that involves higher voltage devices...
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